<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>09_生命周期</title>
    <script type="text/javascript" src="js/vue.js"></script>
</head>

<body>
    <div id="root">
        <h2 :style="{opacity}">欢迎学习Vue</h2>
    </div>
    <script type="text/javascript">
        Vue.config.productionTip = false;
        new Vue({
            el: '#root',
            data: {
                opacity: 1
            },
            methods: {
            },
            mounted() {
                console.log('mounted', this);
                setInterval(() => {
                    this.opacity -= 0.01;
                    if (this.opacity <= 0) this.opacity = 1
                }, 16);
            },
        })
    </script>
</body>

</html>